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How to Solve the Breaker Puzzle in Blue Prince’s Utility Closet

Set the Utility Closet indicators to off, blue, green, white, red, purple from left to right, then pull the lever behind the opened wall to unlock the Gemstone Cavern.
WorldBlue Prince's Utility Closet Length1 min Posted Quest giverVGSources Team
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Set the six breaker indicators from left to right to off, blue, green, white, red, purple. The puzzle is in the Utility Closet, also called the Utility Room in some guides. Once the row is correct, the wall behind the breaker box opens; pull the lever inside to unlock the Gemstone Cavern.

Breaker puzzle solution

Read the indicators from left to right. The required final row is:

Off – Blue – Green – White – Red – Purple

GameSpot’s walkthrough describes a sequence of clicks for reaching that arrangement, but the important check is the finished row—not treating the clicks as a single required code. If your indicators do not match, keep adjusting them until each position shows the target color. When the sequence is correct, the concealed wall opens.

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#1 Best Overall
Blue Prince Day One Edition - PlayStation 5
  • DRAFTING YOUR JOURNEY - Upon reaching a closed door in Mt. Holly, you decide what room appears behind it and each decision shapes your path as you navigate through the manor. Every door can reveal new and exciting chambers that contain their own unique challenges and secrets. But be careful how you draft, for each day the manor’s floor plan resets and the rooms you saw today may not be the same rooms you see tomorrow.
  • EVERY STEP COUNTS - Your progress each day is shaped by the rooms you select to draft and the tools you find within them. Items in the game can be used in a number of creative ways to fuel your exploration deeper into the house, allowing you to adopt unique strategies to combat the challenges that each day brings.
  • A HISTORY IN THE MAKING - As the heir of Mt. Holly, you have been tasked to explore its shifting halls in search of Room 46. Yet as your journey takes you further into the mansion’s depths, you start to discover that there is more lurking under the surface than a missing room. Investigate a past woven with the threads of blackmail, political intrigue, and the mysterious disappearance of a local children’s book author.
  • DAY ONE EDITION BONUSES - Pack-in bonuses include 18” x 12” fold-out poster of the magnificent Mt. Holly Manor and a download code for the official game soundtrack.

How to find the clues

If you want to solve it with in-game hints before using the complete answer, look for the letter in the Mail Room and the email on the Office terminal. The letter introduces the green lights and the blue-and-red combination that produces purple; the email provides the target order. GameSpot’s guide also describes a later Mail Room letter connected to repeated Laboratory experiments, which adds further light interactions.

What to do after solving it

Enter the hidden chamber and pull the large lever. This unlocks the Gemstone Cavern, which grants two gems at the start of each day. You do not need to solve the six-indicator puzzle again on later runs. Drafting the Utility Closet again can still be useful for its other controls.

Rank #2
Blue Prince - PS5
  • The physical edition will include a fold-out poster of the magnificent Mt. Holly Manor
  • Additionally, all pre-orders will include a download code for the official game soundtrack. This code will be included on a voucher inside the game pack for all D1 orders
  • DRAFTING YOUR JOURNEY - Upon reaching a closed door in Mt. Holly, you decide what room appears behind it and each decision shapes your path as you navigate through the manor. Every door can reveal new and exciting chambers that contain their own unique challenges and secrets
  • EVERY STEP COUNTS - Your progress each day is shaped by the rooms you select to draft and the tools you find within them. Items in the game can be used in a number of creative ways to fuel your exploration deeper into the house, allowing you to adopt unique strategies to combat the challenges that each day brings
  • A HISTORY IN THE MAKING - As the heir of Mt. Holly, you have been tasked to explore its shifting halls in search of Room 46. Yet as your journey takes you further into the mansion’s depths, you start to discover that there is more lurking under the surface than a missing room
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Support on Ko-Fi

What the other Utility Closet switches do

The breaker panel also controls several room systems separate from the six-light puzzle:

Quick Recap

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Blue Prince - PS5
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The physical edition will include a fold-out poster of the magnificent Mt. Holly Manor
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  • Use darkness and cover to avoid being overwhelmed by the ship's deadly new inhabitants
  • Seek out the weapon fabricators to increase your firepower as you journey deeper, into the dark and terrifying depths, but beware ammo is limited
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  • Harvest DNA material to improve health, toughness and defensive capabilities.Survive an ever changing labyrinth. Each and every expedition into The Persistence will be disorienting and different.Death is just the beginning. Fatal encounters will result in Zimri's consciousness being uploaded into a new cloned body, ready to try again, with any upgraded stats, suits & weapon schematics kept to aid the next attempt to save the ship
  • Keycard Entry System: Disabling it opens sealed metal doors without requiring a keycard.
  • Gymnasium: The switch changes the room’s step cost.
  • Dark Room: Its lights need to be turned on again after entering.
  • Garage: The switch opens the garage doors.
  • Cabinet: A crossed-out label marks a separate later secret.

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